miekil



(No Model.)

` T. H. MIRKIL, Jr.

STUPFING BOX FOR STEAMHAMMERS.

Patented Mar. 3,1891.

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witnesses: ym. d

' Inventor l UNITED STATES PATENT Fries.

THOMAS II. MIRKILNIR., OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE. SOUTHVARK FOUNDRY AND MACHINE COMPANY, OF SAME PLACE.

STUFFING-BOX FOR STAlVl-HAMMERS.

SPECIFICATION forming part of Letters Patent No. 447,840, dated March 3, 1891.

y Application led November 27, 1888. Serial No.29`l,948. (No model.)

To all whom, it may con/cern:

Be it known that I, THOMAS H. MIRKIL, Jr., of the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Stuffing-Box Glands for Steam-Hammers, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part of this specilication.` io Hy invention relates to the packing-glands of the stuffing-boxes through which the pistonrod orits extension of a steam-hammer passes. Heretofore, owing' to the great shocks to which the stuihng-box glands in steam-hammers are subjected, much trouble has arisen from the breaking of the bolts holding the glands in position aswell as the distortion of the alignment of the stuffing-box gland; and my invention has for its object to relieve the 2o bolts of these injurious strains and transmit them to parts of the apparatus strong enough to sustain th em Without injury. I accomplish the above result by forming in the heavy castings making up the tool (either the frame or z5 the cylinder can advantageously be used) bearings for the outer rim of the gland and forming the gland so that it will fit neatly in said bearings. The adjustment of the gland in the stuffing-box can still be effected in the 3o usual way by bolts and nuts, but all side strains are transmitted at once to the glandbearings in the heavy castings andthe bolts thus relieved.

Reference being now had to the drawings 3 5 which illustrate my invention, Figure I is an elevation of a steam-hammer of the kind known as the Morrison hammer, with its cylinder sectioned to show the way in which my device is applied to it. Fig. 2 is a sec- 4o tional View of the lower part of the cylinder and the adjacent parts of the supports or legs, showing a modification of my invention; and Fig. 3, an enlarged side view of one of the bolts used to hold the gland.

A A are the legs or housings; B, the cylinder; C, the piston; D, the hammer-bar, and D a prolongation of the hammer-bar on the upper side of the pistomwhich, like the bar proper, passes from the cylinder through a 5o stuffing-box and the function of which is to guide and steady the motion of the hammer.

E is the hammer-head, and F the anvil.

G indicates the stuffing-box gland, which may be made up, as usual, of a cylindrical ring, which enters the stuffing-box eLand a flange extending out at right angles to this cylindrical ring to afford a hold to the bolts which hold the gland in place.

I-I H, dsc., are the bolts which hold the gland in place. They may be made with a T-head 6o 71, as shown in Fig. 3.

TL h are the nuts on these bolts.

B indicates an annular space formed in the casting of the lower end of the cylinder, and b slots or elongated perforations entering this space from below and formed to admit the T- head h of bolt H in one direction and afford supporting-surfaces for its ends when it is turned around in it. y

B2, Fig. l, indicates an annular iiange, con- 7o sisting of a prolongation of the cylinder-casting extending below the space B and abutting at a against the housing-castings A.

Its inner face is formed into a bearing for the edge g of gland G, which is carefully finished to have a neat working [it with it. The gland G, through which rod D passes, is similarly tted in a flange B4 of the cylinder-head B5. The space here marked B3 is not inclosed in the outer side, as is space B, but a similar 8o support is afforded for the heads h of bolts H.

In Fig. 2 the flange B2 is dispensed with and a bearing for the edge g of the gland is formed at a in the housing-castings, the fit, as before, being a neat working one.

In putting my device in place the bolts H are inserted in the space B or B3 through bolts b andthe heads turnedto rest on the edges of the hole. The gland is then inserted in the stufling-box J. asusual, the bolts pass- 9o ing through bolt-holes in it, and in so inserting the gland its edge g enters the bearings formed for itin the castings, and it is at once secure against lateral displacement. The nuts h are then screwed on the ends of bolts I-I and the gland made to press on the packing to any desired degree, its movement in the bearings being longitudinal only and in no wise interfering with its lateral alignment.

It is of course obvious that by my device roo no side strain'can at any time come on the bolts, neither can the alignment of stuffingbox gland be altered, and the difficulty noted above is thus completely overcome.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In a steam-hammer, the combination of a stuing-box gland, a space formed in the cylinder-head and perforated with elongated holes or slots to admit the heads of T-headed bolts, bolts secured by their heads in the space and passing through the flange of the gland, and bearings formed in the heavy castings of the tool for the outer surface of the gland, all substantially as and for the purpose specified.

2. In a steam -ham mer, the Combination of a stuffing-box gland, a space formed in the cylinder-head and perforated with elongated holes or slots to admit the heads of bolts, the T-headed bolts secured by their heads in the' space and passing through the ange of the gland, and an annular lange formed integral with and extending beyond the pistonhead and having bearings formed in it for the edges of the ilange of the gland, all substantially as and for the purpose specified.

THOMAS I-I. MIRKIL, JR. litnesses:

JOHN 1I. COOPER, C. O. LINDROTH. 

